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ZOOLOGICAL 
BULLETIN 



EDITED BY 

C. O. WHITMAN and W. M. WHEELER 

THE UNIVERSITY OF CHICAGO 



Volume II 



BOSTON, U.S.A. 

GINN & COMPANY, PUBLISHERS 

C6e atbraaettm fJrces 

1899 



Copyright, 1899 
By GINN & COMPANY 

ALL RIGHTS RESERVED 



CONTENTS OF VOL. II. 



No. i. — July, 1898. 

PAGES 

I. Ethan Allen Andrews. 

Ft lose Activity in Metazoan Eggs I- 1 3 

II. Charles B. Wilson. 

Activities of Mesenchyme in Certain Larvae J5-23 

III. O. P. Hay. 

Observations on the Genus of Fossil Fishes 
called by Professor Cope, Portheus, by 
Dr. Leidy, Xiphactinus 25—54 

No. 2. — October, 1898. 

I. Henry Leslie Osborn. 

Observations on the Anatomy of a Species of 
Platyaspis found Parasitic on the Uni- 
onidae of Lake Chautauqua 55-67 

II. Agnes M. Claypole, Ph.D. 

The Embryology of the Apterygota . . . 69-76 

III. Wm. E. Ritter. 

A Few Facts Concerning the Relationships 
and Reproduction of Some Bering Sea 
Tunicates 77-8 1 

IV. Edward Phelps Allis, Jr. 

The Homologies of the Occipital and First 

Spinal Nerves of Amia and Teleosts . . 83-97 



PAGES 



IV CONTENTS. 

No. 3. — December, 1898. 

I. George William Hunter, Jr. 

Notes on the Finer Structure of the Nervous 

System of Cynthia Partita (Verrill) . . 99-115 

II. Ulric Dahlgren. 

The Maxillary and Mandibular Breathing 

Valves of Teleost Fishes 1 17-124 

III. Florence Peebles. 

The Effect of Temperature on the Regener- 
ation of Hydra 125-128 

IV. Katharine Foot and Ella Church Strobell. 

Further Notes on the Egg of Allolobophora 

Foetida 129-150 

No. 4. — February, 1899. 

I. M. A. Willcox, Ph.D. 

Notes on the Occipital Region of the Trout, 

Trutta Fario 15 1— 1 54 

II. C. H. Turner. 

Notes on the Mushroom Bodies of the Inver- 
tebrates. A Preliminary Paper on the 
Comparative Study of the Arthropod and 
Annelid Brain 155-160 

III. Gustav Eisen, Ph.D. 

Notes on North-American Earthworms of 

the Genus Diplocardia 161-172 

IV. Maurice A. Bigelow. 

Notes on the First Cleavage of Lepas . . . 173-177 

V. Charles A. Kofoid. 

On the Specific Identity of Cotylaspis In- 
signis Leidy and Platyaspis Anodontae 

Osborn 179-186 

VI. C. E. McClung. 

A Peculiar Nuclear Element in the Male 

Reproductive Cells of Insects . . . . 187-197 



CONTENTS. V 

No. 5. — June, 1899. 

PAGES 

I. C. H. Turner. 

A Male Erpetocypris Barbatus Forbes . . 199-202 
II. B. F. Kingsbury. 

The Reducing Divisions in the Spermato- 
genesis of Desmognatkus Fusca .... 203-209 

III. Michael F. Guyer. 

Ovarian Structure in an Abnormal Pigeon . 211-224 

IV. Charles W. Hargitt. 

Some Interesting Egg Monstrosities . . . 225—229 
V. E. C. Case. 

A Redescription of Pariotichus Incisivus Cope 231—245 
VI. Howard Ayers. 

On the Pithecoid Type of Ear in Man . . 247—250 

No. 6. — September, 1899. 

I. J. Playfair McMurrich. 

Contributions on the Morphology of the Acti- 
nozoa. V. The Mesenterial Filaments in 

Zoanthus Sociatus (Ellis) 251-273 

II. Minnie Marie Enteman. 

The Unpaired Ectodermal Structures of the 
Antennata 275-282 

III. Garry de Nord Hough, M.D. 

Synopsis of the Calliphorinae of the United 

States 283-290 

IV. Frank W. Pickel. 

The Accessory Bladders of the Testudinata . 291-302